I created a test application to familiarize myself with the Leonardo board.
The project functions correctly as long as I keep all of the code in the project ino file.
When I attempt to split the code into modules, I get compile errors indicating that the compiler cannot find the function.
The additional module is included in the project folder (comms.c) and a header (comms.h) is included in the same folder. The header included the prototype.
The additional file is compiled (errors are reported) and I can use a string declared in the comms.c file in the main ino file using extern, indicating that the compiling is done correctly.
The included library for the timer interrupts also functions properly.
However, I get two errors when using a function in the additional module:
- The complier reports that it cannot find the function.
- The function makes use of Serial.print() and the compiler reports that it cannot find "Serial".
I can't seem to find a header that should be included to support the "Serial::function" library.
I have included a pic of the tabs within the project.
Code for project .ino:
/** Files Included *******************************************************/
#include "Defines.h"
#include <TimeInterrupt.h>
#include <avr/wdt.h>
#include "Comms.h"
/** Definitions **********************************************************/
#define WatchdogLed 13
#define WatchdogTimingHi 60
#define WatchdogTimingLo 20
/** Global variables and Arrays ******************************************/
bool LedChange = 0;
uint8_t LedTmr = 0;
extern const uint8_t Version[];
extern const uint8_t Product[];
//---------------------------------------------------------------------------------------
// Initialization
//---------------------------------------------------------------------------------------
void setup()
{
Serial.begin(9600);
while (!Serial) {}
pinMode(WatchdogLed,OUTPUT);
TimeInterrupt.begin(PRECISION); //Initialize the interrupt with high precision timing
TimeInterrupt.addInterrupt(TimerHandler, 10); //Call 'TimerHandler' every 10mS
Serial.println(F("Timers Started"));
PrtCrLf();
PrintId();
// PrintId2();
}
//#######################################################################################
// Main Loop
//#######################################################################################
void loop()
{
if(LedChange)
{
digitalWrite(WatchdogLed, !digitalRead(WatchdogLed));
LedChange = 0;
if(digitalRead(WatchdogLed)) LedTmr = WatchdogTimingHi;
else LedTmr = WatchdogTimingLo;
}
}
//---------------------------------------------------------------------------------------
// Timer Tick (10mS)
//---------------------------------------------------------------------------------------
void TimerHandler()
{
if(LedTmr)LedTmr--;
else
{
LedChange = 1;
}
}
//########################################################################################
// Comms routines
//########################################################################################
//______________________________________________________________________________________
// Print a String of Text - not Formatted
//______________________________________________________________________________________
void PrtString(const char *str)
{
uint8_t idx = 0;
while(str[idx] !=0)
{
Serial.print(str[idx]);
idx ++;
}
}
//___________________________________________________________________________________________
// Print Version of Hardware and Software
//___________________________________________________________________________________________
void PrintId()
{
Serial.println("Leonardo Tester");
Serial.print("Revision: ");
PrtString(Version);
PrtCrLf();
}
void PrtCrLf()
{
Serial.write(Cr);
Serial.write(Lf);
}
Comms.c file:
*************************************************************************
* Leonardo Tester
************************************************************************/
/** Files Included *******************************************************/
#include <Arduino.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include "Defines.h"
#include "Comms.h"
/** Global variables and Arrays ******************************************/
const uint8_t Version[] = "0.01";
const uint8_t Product[] = "Leo Tester> ";
void PrintId2()
{
// Serial.print("Revision");
// Serial.println(Version);
// Serial.println("Leonardo Tester");
}
Comms.h file:
#ifndef comms_h
#define comms_h
void PrintId2();
#endif
The error report when un-commenting "PrintId2":
Arduino: 1.8.13 (Windows 10), Board: "Arduino Leonardo"
C:\Users\danie\AppData\Local\Temp\ccAfhuos.ltrans0.ltrans.o: In function setup': C:\Arduino\Projects\LeoTest/LeoTest.ino:37: undefined reference to PrintId2()'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino Leonardo.
If a Serial.print() line is un-commented in the "Comms.c" file:
Arduino: 1.8.13 (Windows 10), Board: "Arduino Leonardo"
"C:\Users\danie\AppData\Local\Temp\arduino_build_111200\sketch\Comms.c" -o "C:\Users\danie\AppData\Local\Temp\arduino_build_111200\sketch\Comms.c.o"
C:\Users\danie\AppData\Local\Temp\arduino_build_111200\sketch\Comms.c: In function 'PrintId2':
Comms.c:24:3: error: 'Serial' undeclared (first use in this function); did you mean 'ceil'?
Serial.print("Revision");
^~~~~~
ceil
C:\Users\danie\AppData\Local\Temp\arduino_build_111200\sketch\Comms.c:24:3: note: each undeclared identifier is reported only once for each function it appears in
exit status 1
'Serial' undeclared (first use in this function); did you mean 'ceil'?
Can anyone tell me what I am doing wrong?
